Ice cream machine



FIG. 1 is a front perspective view of an ice cream machine, showing my new design.

FIG. 2 is a rear perspective view thereof.

FIG. 3 is a top plan view thereof.

FIG. 4 is a front elevational view thereof.

FIG. 5 is a rear elevational view thereof.

FIG. 6 is a side elevational view thereof. 

The ornamental design for an ice cream machine, as shown. 